Jasper Selwyn died in 1634, and was buried at Matson. His monument describes him as 'Counsellor at law and one of His Majesty's Justices of the Peace for the County of Gloucester.' From his will, which I have examined at the Gloucester Probate Court, it appears that he left his plate and other moveables to his daughters, Margaret, Sarah, and Dorothy, and certain fittings of the house, which he describes as 'wainscot and glass,' to his son William, stipulating that his widow, whom he makes his sole executrix, should have the use of them during her life-time. The will is a very short one, and more than half of it is a solemn declaration of his Christian faith. Margaret Selwyn survived her husband only two years.

The notches in this window sill were cut by the future Kings Charles II and James II in their boyhood, when they were living in Matson House with their father King Charles I during the siege of Gloucester by the Royal troops in August 1643.